Hey ya'll i've got a question about stocking, I've have had my tank for about four months now and she is fully cycled. I've got a decent stock in there right now with four glo danios,two of the glo tertas(bred from the white skirt species),Five neon tertas,five X ray pristella tertas, and one red flower shrimp. While the stock is great i just look and find something missing like a living room with no center piece to tie it all in.

Specs of the tankMarineland Penguin 150 over hang filter
Marineland Prefect flow undergravel filter
LED light with 3 Blue moon
Marineland Maxijet 400 as a powerhead
whisper air pump for bubble wand and air stone

So my question is what in your opinion should be my next step in the stocking or should i even stock anymore fish?